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1.7 Energy, work and power

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Question 267

An audio engineer is setting up a loudspeaker for a school assembly.

Which energy transfer takes place in the loudspeaker?

A

Input energy: sound; Output energy: electrical

B

Input energy: electrical; Output energy: sound

C

Input energy: chemical; Output energy: electrical

D

Input energy: electrical; Output energy: thermal

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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